Bobbin lifter



' 2| 1 i 23 0 g i: I6 I p 1948. R. J. BARTHOLOMEW 2,450,074

BOBBIN LIFTER Filed Nov. 12, 1947 i l. J n

gill My lnill I llihmzllii I llllllllill INVENTOR. ROBERT J.'BARTHpLOMEWATTORNEY.

Patented Sept. 28, 1948 BOBBIN LIFTER Robert J. Bartholomew,Philadelphia, Pa., assignor to Fletcher Works Incorporated,Philadelphia, Pa a corporation of Pennsylvania Application November12,1?47, Serial No. 785,477 I 'tainment of a predetermined size of yarnpackage.

For. this purpose latches were provided, which uponreleasqpernuttedspring to move the yarn package but of'engagement with the driving roll.These "and. other detector devices heretofore available have not provenwholly satisfactory under'operating" conditions.

It is the principal object of the present inven; tion to provide abobbin lifter which is adapted to lift the bobbin out of contact withthe driving .roll upon a break or reduction in tension of the yarn beingwound, or upon the completion of the yarn'package.

It'is a further object of the present invention to provide a bobbinlifter which maybe installed on new machines but which is also capableof use with machines now operating, for discontinuing the rotation ofthe bobbin or yarn package upon a break or reduction in tension of'theyarn being wound or upon the completion of winding of the yarn package.

It is a further object of the present invention to provide abobbinlifter which is simple in construction, which is automatic in itsoperation, and which does not require the use of springs, springheidlatches, or'the like.

It is a further object of the present invention to provide a bobbinlifter in which power from the driving roll operating shaft'of themachine on which the bobbin lifter is mounted is utilized for elevationof the yarn package.

Other objects and advantageous features of the invention will beapparent from the specification and claims.

The nature andcharactcristic features of the invention will be morereadily understood from the following description, taken in connectionwith the accompanying drawings forming part hereof, in which:

Figure l is a front elevational view of a bobbin lifter in accordancewith the present invention;

Fig. 2 is a side elevational'view thereof showing the position duringthe normal winding operation and showingin broken lines an intermediatePosition of the; lifter mechanism 12 Claims. (crass-37) Fig. 3 is a viewsimilar to Fig. 2 showing another position of the lifter with the yarnpackage in elevated position; and m Fig. 4. is an end view, enlarged, ofone of the links employed in connection'with the lifter.

.It should, or course, be understood that the description and drawingsherein are illustrative merely, and that variou modifications andchanges may be made in the structure disclosed without departing fromthe spirit of the invention.

Referring now more-particularly to the drawings in which a preferredembodiment is illustrated, a fragmentary portion of the frame ill of amachine is shown, which machine may be a winding machine, a spinningmachine, a doubling machine or any other machine on which a plurality ofyarn packages are wound, usually with their axes horizontal and alinedand in one or more rows. The

yarn packages may be of any desired type; with a bobbin or spool, andwith a flange at one end, a flange at both ends, or in which no flangesare employed. Each of the yarn packages is adapted to be supported on 9,spindle I i.

The frame I0 is provided with spaced .uppe brackets i 2, each havingtrunnions If in which pins ll carried by spaced yarn package supportinglevers I! are adapted to be pivotally mounted. The trunnions ii are of acharacterto permit the removal of the plus I l and the levers i 5supported thereby, if desired.

The lower end of the levers ii are provided with hooked portions Itwithin which the spindle H is adapted to be removably mounted, thespindle l I providing a support for the yarn package.

The machine has mounted in the frame it thereof the customarylongitudinallyextending shaft I! having thereon a driving roll it foreach yarn package, the outer or peripheral face of which is adapted forengagement with the periphery of a yarn package being wound for rotatingthe yarn package. The shaft I1 is also provided, for each yarn package,with a cam is having at least one lobe 20 thereon for purposes to beexplained.

The frame I0 is also provided with spaced lower brackets 2i, one pairfor each yarn package, which brackets 2i have trunnions 22' for thereception of pins 23 carried by lifter levers 24.

Each of the lifter levers 24 has an arcuate portion 25 to the rear ofthe pivot pins 23 which extends upwardly and is plvotally connected by apin 26 to a link 21 which is in turn pivotally connected by a pin 28 toone of the supporting levers it. The length of the link 21 and the8,450,074 location of the pivot pin "are such that the pivot pin "maymove past its dead center position with respect to the link I! forholding the supporting levers II in elevated position, as herematterexplained.

The link 11 may be of fixed and predetermined length but as illustratedis adjustable in length. For this purpose one section 21a of the link 21is slotted as at'i'lb and is slidably mounted with respect to the othersection 21c. A screw lid is mounted in the link section 210 and extendsthrough the slot 21b for locking the link 21 at the desired adjustmentof its length.

Each of the lifter levers 24 also has a forwardly extending portion 2|,and a cross bar II is provided for connecting the forwardly extendingportion a of each pair of lifter levers.

Each of the lifter levers ll also has a rearwardly disposed downwardextension ll and a connecting bar 32 extends between each pair of litterlevers 24. The connecting bar 3! -is' connected to the lifter levers Iby screws 33 and N.

The lower brackets 2| each have rearwardly extending portions ll againstwhich the screws 33 are adapted to abut to serve as a stop when thelifter levers It are moved to one of their positions, as illustratedmore paricularly in Fig. 3.

The forwardly extending portions ll of the liftpbsitlon. .The cam It, inits rotation. engages with the end portion ll of the actuating finger l2and the force thus applied is effective through the finger 42 and on thelifter lever 24 which is moved about the pivots provided by the pins 28.The movement of the lifter lever 24 is eflective throu h the link 21 forelevating the supporting levers II. The periphery of the yarnpackage isthus separated rrom its engagement with the driving roll it. Movement ofthe lifter lever it also moves the actuating finger 42 to a position outof enin Fig. 8.

er levers 24 are provided at the front ends thereof with pivot pins onwhich detector levers l'l are pivotally mounted. The detector levers Ilsupport, at their outer ends, a horizontal detector bar or rod II whichextends between the levers I! for each yarn package. The rear end of thedetector lever :1, beyond one end ot-the yarn pack age. is pivotallyconnected by a pivot pin ii to a,

detector link 40, the link ll being pivotally connected by a pivot pinll to an actuating finger 4 2. The actuatingvnnger 42 is pivotallyconnected to and mounte'd'at one end on the lifter lever 24 by a pivotpin 43, and has an end portion 44 which is adapted to be positioned ashereinafter ex-, .plaincd, for engagement by the cam II on the shaft 11.r

The length of the detector link I and the location of the pivot pin itare such that the pivot pin a may move past its dead center positionwith respect to the-detector lever ill for holding the actuating finger42 in locked position, as hereinafter explained.

1 The mode or operation-will now be pointed out. In normal operation theyarn package is supported by the spindle II, in eng ement inthetrunnions it in the supporting levers II. and with the periphery ofthe yarn package in driving en gagement with the periphery of thedriving roll ll. The detector bar 38 is in the uppermost po= sition,indicated in solid lines in Fig. '3, and' is heldin this position by theengagement therewith of the yarn being delivered to the peripheralsurface of the yarn package.

In this position the actuating finger u is held in a position away fromand out of engagement with the cam II. The lifter lever 24 is also inthe position shown in solid lines in Fig. 2.

7 It the yarn should break or if the tension thereof is greatlydecreased for any-reason, the detector bar as is no longer held in itsuppermost position and by its own weight swings about the pivotsprovided by the pins 36 to a position to move the actuating finger 42into the path of the lobe 20 of the cam it, as shown in broken lines inFig. 2. In-this movement the lever 31 moves with respect to the linkpast dead center posi- Upon the swingingof' the lifter lever 24', the,

heads of the screws II engage with the underside of the lower bracketextensions 88 and limit the further movement of the lifter lever 24.

I Upon the adjustment of the tension of the yarn or upon the repair ofthe break, the detector bar SI and the lifter lever ll may then be swungmanually by movement of the detector bar, It back to the initialposition with the periphery of the yarn package again in engagementwiththe periphery of the driving roll it for rotation of yarn package. Thedetector bar It will then be held by the tension of the yarn, as before,in its:

uppermost position. A,

.If, during .the windin predetermined amount of yarn has been deliveredthereto. the elevation of; the yarn package inthe supporting levers lltends to carry the linksjl',

upwardly and to aposition where they swing past the dead center positionreferred to above and separate the yarn package from the driving rollll, thereby discontinuing rotation of the yarn package. The adjustmentof the ing roll II when a predetermined size-of yarn package has beenattained.- A link 21 of;pre-

determinediilxed length could be utilized where.

with a yarn package, the combination of supporting members movablymounted with respect to said frame in which a yarn package is adapted tobe rotatably supported for engagement withthe driving roll, a lifterlever plvotally mounted with respect to said frame for moving saidsupporting members to position said yarn package out of engagement withsaid driving roll, a de-= tector bar in axial alinement with the yarnpackage pivotally mounted with respect to said lifter lever forengagement by the yarn delivered to said yarn package, said detector barbeing held in one position by the tension of said yarn and being movableto another position upon release of the yarn tension. aneccentricmember-carried: by said shaft, an actuating finger for 'eilecting,actuation of said lifter lever and movement ofsaid supporting memberspivotally mounted on said lifter lever and movable to a position forengagement with said eccentric member, and

- members connecting said detector bar and said v actuating finger-forpositioning saidactuatingticn so that the actuating finger 42 is lockedin i'inger for engagement by said eccentric member a length of the linkll permits of discontinuance of driving by the driv-.

for a yarn winding ma-- I upon movement of said'detector bar to saidother position.

-2. In an attachment for a yarn winding machine having a frame and ahorizontal shaft with a'driving roll for peripheral driving engagementwith a yarn package, the combination of supporting members movablymounted with respect to said frame in which a yarn package is'adapted tobe rotatabiy. supported for engagement with the driving roll, a lifterlever pivotally mounted with respect to said frame and connected to saidsupporting members for elevating said supporting members and separatingsaid yarn package from engagement with the driving roll, a detector barin axial alinement with the yarn package pivotally mounted with respectto said lifter lever for engagement by the'yarn delivered to said yarnpackage, said detector bar being held in an upward position by thetension of said yarn and-being movable to a downward position uponrelease of the yarn tension, an eccentric member carried by said shaft,an actuating finger for said lifter lever" pivotally mounted'on saidlifter lever and movable to a position for engagement with saideccentric member, and members connecting said detector bar and saidactuating finger for positioning said actuating finger for engagement bysaid eccentric member upon movement of said detector bar to its downwardposition.

:3. In an attachment for a yarn winding machine having a frame and ahorizontal shaft with a'driving roll for peripheral driving engagementwith a yarn package, the combination of supporting members movablymounted with respect to said frame in which a yarn package is adapted tobe rotatabiy supported for engagement with the driving roll, a lifterlever pivotally mounted with-respect to said frame and connected to saidsupporting members for moving said supporting members to a position forseparating the yarn package from the driving roll, members for retainingsaid supporting members in said position,

a detector bar in axial alinement with the yarn package pivotallymounted with respect to said lifter lever for engagement by the yarndelivered to said yarn package, said detector bar being held in oneposition by the tension of said yarn and being movable to anotherposition upon release of the yarn tension, an eccentric member carriedby said shaft, an actuating finger for effecting actuation of saidlifter lever pivotally mounted on said lifter lever and movable to aposition for engagement with said eccentric member, and membersconnecting said detector bar and said actuating finger for positioningsaid actuating finger for engagement by said eccentric member uponmovement of said detector bar to said other position.

4. In an attachment for a yarn winding machine havin a frame and ahorizontal shaft with a driving roll for peripheral driving engagementwith a yarn package, the combination of supporting members movablymounted with respect to said frame in which a yarn package is adapted tobe rotatably supported for engagement with the driving roll, a, lifterlever pivotally mounted with respect-to said frame and connected to saidsupporting members for moving said supporting members to a position forseparating said yarn package from said driving roll, a detector bar inaxial alinement with the yarn package pivotally mounted with respect tosaid lifter lever for engagement by the yarn delivered to said yarnpackage, said detector bar being held in one position ,engagement bysaid eccentric member upon movement of said detector bar to said otherposition 5. In an attachment for a. yarn winding machine having a frameand a horizontal shaft with:

a driving roll for peripheral driving engagement with a yarn package,the combination of lever members connected for movement inunison'pivotally mounted with respect to said; frame and in which a yarnpackage is adapted to be rotatably supported for engagement with thedriving roll a lifter lever pivotally mounted with respect to saidframe, a link connecting one end of said lifter lever and said levermembers, detector bar levers pivotally mounted on the other end of saidlifter lever, a detector bar between theends of said detector levers andin axial aiinement with the yarn package for engagement by the .yamdelivered to said yarn package, said detector bar being held in anupward'position by thetension of said yarn and being movable to adownward.- position upon release of the yarn tension, an edcentricmember carried by said shaft, an actuating finger for moving said lifterlever pivotally mounted on said lifter lever and movable-to a. positionfor engagement with said eccentric meme her. and a link connecting saiddetector bar levers and said actuating finger for positioning said.actuating finger for engagement by said eccentric 1 member upon movementof said detector bar to. its downward position. 1

6. In an attachment for a yarn'winding ma-, chine having a frame and ahorizontal shaft. with a driving roll for peripheral driving engagementwith a yarn package, the combination, of-

supporting members movably mounted'withrespect to said frame in which ayarn package is adapted to be rotatabiy supported for engagement withthe driving roll, a lifter lever for posi, tion-ing said supportingmember pivotally mountq ed with respect to said frame, connectionsbetween said lifter lever and said supporting members for holding saidsupporting members and maintaining said yarn package out of engagementwith said driving roll, yarn tension controlled members carried by saidlifter lever, an

- eccentric member carried by said shaft and engageable by one of saidyarn tension responsive members upon release of the yarn tension foreffecting actuation of said lifter lever and movement of said supportingmembers to position saidyarn package out of engagement with said drivingroll, said yarn package being adapted upon its completion to actuatesaid connections to hold said package out of driving engagement with thedriving roll.

7. In an attachment for a yarn winding machine having a frame and ahorizontal shaft with a driving roll for peripheral engagement with ayarn package, the combination of supporting members movably mounted withrespect to said frame in which a yarn package is rotatabiy mounted forengagement with the driving roll, means responsive to the release of thetension of the yarn delivered to the yarn package for moving saidsupporting members to a position to separate the yarn package fromengagement with the driving roll, said means'including a lever pivotallymounted with respect totsaid frame and a link member interposed betweensaid supporting members and said lever, said link member being ofpredetermined length for controlling the sike of the-yarn package by theseparationof amen v f r v which a yarn package engagement'withthedriving roll, and means for separating said yarn package from drivingenl kement with said driving roll including a lever member pivotallymounted with respect to said frame. and a link member interposed betweensaid lever member and said supporting members, said link member beingof'predetermined length the yarn delivered to the yarn package formovir'lg said supporting member; to a position to s separate the yarnpackage from engagement with the driving roll, said means including alever pivotally mounted with respect to said frame and a link memberinterposed between said supporting members and said lever. saidlink-member being adjustable in length for controlling the size of theyarn package by the se aration of said package from the driving roll.

9. In an attachment for a yarn winding ma.

chine having a frame and a horizontal shaft with a driving roll forperipheral engagement. witha yarn package. the combination of a pair ofsupporting members plvotally movable with respect to said frame andhaving outer end portions in which a yarn package is rotatably mountedfor engagement with the driving roll, and means for f separating saidyarn package from driving engagement with said driving roll including apair of spaced lever members pivotally mounted with respect to saidframe, and a pair'of link members each of which is interposed betweenone oi v said lever members and one of said supporting members, saidlink members being of predetermined length for controlling the size ofthe yarn package by the separation ofsaid package from 45 rationof saidporting members pivotally movable with respect to said frame and havingouter end portions in {are controlling the sins of. the yarn package byroll. I 11. In an attachment for a yarn winding machine having a frameand a horizontal shaft with a driving roll for peripheral engagementwith a yarn package. the combination of supporting members plvotaliymovable with respect to said frame and having outer end portions inwhich a yarn psckage'is rotatably mounted for engagement with thedriving roll. and means for separating said yarn-package from drivingengagement with said driving roll including a lever member pivotallymounted with respect to said frame, and a link member interposed betweensaid lever member and said supporting members, the combined lengths ofsaid link member and lever member controlling the size of the yarnpackage by the separation of said package from the driving roll.

12. In an attachment for ayarn winding machine having a frame and ahorizontal shaft with a driving roll for peripheral engagement with ayarn package. the combination of supporting members 'pivotally movablewith respect to said frame and having outer end portions in which a yarnpackage is rotatably mounted for engagement with the driving roll, andmeans for sens-- rating said yarn package from driving engagement withsaid driving roll including a pair of lever members pivotally mountedwith respect to said frame. and link members interposed between each ofsaid lever members and one of said supporting members. the combinedlengths of each pair of said link member and lever member con-- trollingthe size of the yarn package by the sepapackage from the driving roll.

ROBERT J. BAR'I'HOLOMEW.

No references cited.

is rotatably mounted for separation of said package from the driving

